Well if you want to go down the rabbit hole of germ theory (which lead to vaccines) and why its bullshit, you'll find answers for detoxing your child. The answers will turn your universe upside down, just a warning.

You can read Bechamp or Pastuer for the entire overview of how Germ theory started to get your foundation. https://www.amazon.com/Bechamp-Pasteur-Ethel-Hume/dp/0648859401/ref=asc_df_0648859401/?tag=hyprod-20&linkCode=df0&hvadid=475772153738&hvpos=&hvnetw=g&hvrand=11179569514787725122&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9002502&hvtargid=pla-910271019513&psc=1

Or you can skip to We Want to Live by Aajonus Vonderplanitz for the specific solution to detoxing your child of the vaccine. It's based on the previous book and still covers the foundations to some extent. https://www.primaldiet.net/shop/we-want-to-live-book-pdf-download/

I can send you both books as epubs/pdf for free if you PM me. Up to you. Again, this is not gonna be easy info to digest. You'll have stew in it for awhile to wrap your head around it. There are reddit forums on the primal diet so there is a community. You dont have to jump in head first, take baby steps with the diet. It may seem extreme, but these are extreme circumstances.